Solved

Direct Attached Storage, Raid 10 vs Raid 5 for Backup server.

Posted on 2009-04-06
1
428 Views
Last Modified: 2013-11-14
I understand raid 10 and raid 5, and I know quite a bit about their strength's and weaknesses in normal applications.  What I need assistance with is a special application of these drives.  

The situation is this:  We will have (14) 1TB Near Line SAS drives (7200 RPM drives with SAS connections for better throughput) http://www.seagate.com/docs/pdf/datasheet/disc/ds_barracuda_es_2.pdf

It will be for our backup server. So heavy writes of tiny delta files (1k or so) up to files in the hundred meg range.  It gets hit by several hundred servers around the same time at night 9pm or so all through the night.  The only time anything is read from it is when we need to recover a file, or when we start replicating the data to an offsite storage unit.

We have had issues before with the replication causing high read queues and never actually completing on our current setup (7 drives with sata throughput) which is why we are considering raid 10.  

In such a large write heavy situation is raid 10 reccomended ?  Or will the fact that we have 14 drives to spread the writes across make up for the difference if we go with Raid 5?  Is there even a performance boost to reads with raid 10 vs 5 ?

Thank you!
0
Comment
Question by:heliontech
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 30

Accepted Solution

by:
Duncan Meyers earned 500 total points
ID: 24082798
RAID 1/0 will always be faster than RAID 5 with a heavy write load as  you only have two write operations  at the discs for every host I/O rather than four. Given your description of the environment, I'd use a RAID 1/0 set with as many physical discs as possible to achieve the throughput you need. RAID 5 will give you greater storage efficiency, but write performance will be poor once the RAID controller write cache is saturated.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Each year, investment in cloud platforms grows more than 20% (https://www.immun.io/hubfs/Immunio_2016/Content/Marketing/Cloud-Security-Report-2016.pdf?submissionGuid=a8d80a00-6fee-4b85-81db-a4e28f681762) as an increasing number of companies begin to…
The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question